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Organism
  Chromista
         [Microbe]
      Chrysophyta
            Bacillariophyceae
                    Pennales
                            Bacillariaceae
                                     Bacillaria
                                     Cylindrotheca
                                     Cymbellonitzschia
                                     Denticula
                                     Gomphonitzschia
                                     Hantzschia
                                     Nitzschia
                                     Psammodictyon
                                     Simonsenia
                                     Tryblionella